Improvement in condensers for steam-pumps



UNITED STATES PATENT OFFICE.

DAVID STODDART, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT IN CONDENSERS FOR STEAM-PUMPS.

Specification forming part of Letters Patent No. 145,538, dated December 16, 1873 application filed July 21, 1873.

To all whom it may concern:

Be it known that I, DAVID STODDART, of the city and county of San Francisco and State of California,have invented a Condenser for Steam-Pumps, of which the following is a specification The object of my invention is to attain the condensation of the exhaust steam from the cylinders of steam-pumps.

Referring to the accompanying drawings forming a part of this specification, Figure l is an end view of the condenser, and Fig. 2 is a longitudinal section through the plane L M.

Ais the suctionpipe connecting to the pumpchamber of a steam-pump. B is the exhaustpipe from its steam-cylinder. C is a tight cylindrical chamber, having a cylindrical lining, D, which is interposed in the suction-pipe, and forms apart thereof. The lining is perforated with numerous small holes drilled inclined to its axis, the inclination being as nearly as practicable coincident in direction with the current of water through the suction-pipe.

Heretofore it has been common to exhaust directly into the suction-pipe by one opening, wherebythe steam, coming suddenly in contact with a limited amount of water, causes violent agitation, even when the direction of the en- .tering exhaust steam coincides with the flowof the forces tends to assist the column of water in its onward course. The lining D may have the holes without inclination, and still the arrangement will be practicable and useful, but of impaired efiiciency, as compared with the inclined perforations.

An important practical advantage of this condenser is that it may be readily inserted into any suction-pipe, whether vertical, inclined, or horizontal, while presenting facility for connection of the exhaust-pipe at any de sired position. When the steam-pump runs at quick or ordinary speed the chamber C will not usually be filled withwater between the reciprocations but when the pump Works slowly, or the current of water is slow in the suction-pipe, then the water may enter the chamber C to some extent. In such case the impulse of the exhaust will be partly expended on the contained water, causing a return water-current through the perforations, and a retarded exhaust in point of time, which, under Having described my invention fully, as

above, what I claim, and desire to secure by Letters Patent, is as follows:

The combination of the perforated lining D, the suction-pipe A, the chamber C, and the exhaust-pipe B, arranged substantially as described.

DAVID STODDART.

Witnesses:

JOHN THoMsoN, WM. G. DIXON. 

